TMS Automated Accessorial Matrix: Truck Order Not Used (TONU), Layover Tariffs, and Diverted Load Surcharges

The tms automated accessorial matrix has become a mission-critical component of modern freight operations. Motor carriers and freight brokers lose millions annually to uncollected or incorrectly calculated accessorial charges. A well-engineered matrix that automatically handles Truck Order Not Used (TONU) fees, layover tariffs, and diverted load surcharges can recover 3-7% of annual revenue that would otherwise disappear into reconciliation black holes.

At Strong Tower Consulting we have audited dozens of carrier TMS implementations. The consistent finding is that manual accessorial entry creates both revenue leakage and audit risk. Automation of the accessorial matrix, when built with precise contractual trigger rules, eliminates subjectivity and ensures every qualifying event generates the correct line item on the freight bill or invoice.

The Massive Uncollected Revenue Leakage of Freight Accessorials

Industry data consistently shows that accessorials represent 8-15% of total transportation spend. Yet many carriers collect less than half of what their contracts entitle them to receive. The primary culprits are:

• TONU events that are never recorded or billed
• Layover days that exceed free time but are not flagged
• Out-of-route mileage from diverted loads that is absorbed as "cost of doing business"

A properly configured tms automated accessorial matrix closes these gaps by evaluating real-time events against carrier-specific rate tables and contract terms. The system can generate Bill of Lading line items automatically, attach supporting documentation, and push the supplemental charge into the accounts receivable workflow without manual intervention.

Contractual Trigger Rules: Defining TONU Grace Periods and Arrival Cutoffs

The foundation of any effective tms automated accessorial matrix is a precise set of contractual trigger rules. For Truck Order Not Used fees, the system must distinguish between a true TONU and a simple cancellation.

Typical TONU logic includes:

• Load formally dispatched to a specific truck and driver
• Driver has arrived at shipper within the defined arrival window
• Grace period (commonly 2-4 hours after scheduled pickup time) has expired without loading commencing
• Cancellation notice received after the above conditions are met

The TMS must store these rules per customer, per lane, and per contract effective date. When a load is canceled, the system evaluates the current status against the matrix and, if criteria are satisfied, automatically adds the TONU fee as a line item. This eliminates the common failure mode where dispatchers "let it go" because they lack immediate documentation or fear damaging the customer relationship.

Automated Layover Rate Calculations and Multi-Day Equipment Detention

Layover tariffs present unique challenges because they often accrue across multiple days. A robust tms automated accessorial matrix tracks equipment status from arrival through departure, applying the correct daily rate after free time expires.

Key technical parameters include:

• Free layover time (typically 24 or 48 hours from first available loading time)
• Daily layover rate (flat or escalating)
• Weekend and holiday rules
• Maximum layover days before storage charges apply

The system uses ELD data to confirm the trailer or power unit remained at the facility. When the layover threshold is crossed, the matrix generates the appropriate charge and can even send proactive notifications to both carrier billing and the customer.

Out-of-Route Diverted Load Surcharges and Automatic Supplemental Invoicing

When a load is diverted to a new destination, the original rate no longer reflects actual costs. The tms automated accessorial matrix must recalculate total miles, identify out-of-route segments, and apply the appropriate per-mile or flat diversion surcharge.

Modern route engines integrated with the accessorial matrix can:

• Compare original dispatched route against new destination
• Calculate additional loaded and empty miles
• Apply customer-specific diversion rates from the matrix
• Generate a supplemental invoice or revised BOL line item within minutes of the diversion order

This capability is especially valuable for brokers managing complex networks and for carriers with high volumes of drop-and-hook or multi-stop freight. Automation removes the lag that typically allows diverted loads to be invoiced at the original rate, permanently forfeiting the additional revenue.

Independent Advisory Perspective

Our role is to help motor carriers and private fleets design and implement accessorial automation that aligns with their specific contracts, not the limitations of any single TMS platform. Whether you operate your own transportation management system or use a hosted solution, the contractual logic and rate matrix should be under your control and auditable at all times.

We regularly assist clients in mapping current manual processes to automated rules, identifying gaps in their existing TMS configuration, and creating future-state architectures that support high-fidelity accessorial billing. This work consistently delivers measurable ROI through recovered revenue and reduced administrative burden.

Frequently Asked Questions